# 21430421 Washer | Genuine Volvo Penta Part

## 🔧 Product Description

Heavy-duty washer used in the adjustable front rubber-cushion mounting assembly on Volvo Penta D11C2-A MP IPS installations. It works with the adjusting screw, companion washer and retaining nut to spread load and maintain the set mounting height required for correct engine-to-IPS alignment.

## 🚤 Compatibility

-   **Engine Family:** D, EM
-   **HP Range:** 145-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta front IPS engine-mount washer
-   Used in the D11C2-A MP adjustable front rubber-cushion assembly
-   Spreads clamping and adjustment load across the mounting hardware
-   Supports accurate engine height and propulsion alignment
-   Should be inspected with the adjusting screw, companion washer, nut and rubber cushions
-   Engine type: Volvo Penta D11 marine diesel with IPS propulsion

## 🔌 Function

Provides the correct bearing surface within the adjustable engine-mount stack. It allows the mount to be tightened and adjusted without damaging the rubber cushion or concentrating load around the screw and nut.

## ⚠️ Common Signs of Failure

-   Visible cupping, cracking or elongation around the centre hole
-   Corrosion or fretting between the washer and adjusting hardware
-   Loss of engine-mount adjustment or repeated loosening of the mounting nut
-   Uneven compression of the front rubber cushion
-   Engine vibration or alignment movement caused by a damaged mounting stack

## 🛠️ Service Notes

-   Check you are fitting the same type of washer that came out — plain, hardened, sealing and locking washers are not interchangeable, and the wrong one either fails to seal or fails to hold
-   Treat sealing washers on fuel, oil and coolant unions as single-use; they seal by deforming onto the faces, so a used one will not seal reliably a second time
-   Clean the seating faces and make sure the washer sits flat and square, fully under the head or nut, before tightening — a washer trapped on a chamfer or edge will crush unevenly
-   Tighten the fastener to the figure given in the workshop manual for your engine, and account for every washer on reassembly so none is left loose inside a housing or the engine bay

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21430421 → Supersedes 3593855

### OEM / Related Numbers

-   3593855 earlier number superseded by this part
-   21187581 - Front rubber cushion, quantity 2
-   3593856 - Adjusting screw
-   3593858 - Companion washer
-   3594127 - Adjusting nut
-   60113332 - Washer, quantity 2
-   990697 - Lock washer, quantity 2
-   990973 - Hexagon nut, quantity 2

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
-   Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G, D4-175 VG
-   Volvo Penta EM-PMI540-T3000-2000-QUAD, EM-PMI540-T1500-2400-DUAL

## Details

- **Price:** 107.18 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 107.18 AUD | In stock |

## Images

- 21430421 Washer | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21430421-washer-genuine-volvo-penta)
> Updated: 2026-09-19